Coaster-brake.



P. P. OHORO & R. KELLER.

COASTER BRAKE.

APPLICATION FILED APR.29, 1914.

1,149,149. Patented Aug. 3, 1915.

CDLUMMA PLANQURAPH C0..w/\sHxNaTnN, D. c.

PETER?. oiioRo AND REDOLPH KELLER, 0E omesso, iLLIivois.4

Consilina-BRAKE.

certain new and useful Improvements .inf -Coaster-Brakes, of which the following is a specication.-

This invention relates to improvements in hubs for driving and braking bicycles-and vsimilar vehicles.

Among the objects of the invention are to reduce thenumber of parts, to obviate the necessity of providing braking surfaces of bronze or other metals different from` that used in the general construction of theV hub, and to provide avery powerful brake.

In the accompanying drawings, Figure 1 is a horizontal sectional view of a wheel hub embodying the features of our invention. The parts are shown in the braking position. Fig. 2 is a similar view but showg` ing the parts in the free-running or coasting position. Fig. 3 is a view like those in Figs. 1 and 2, but showing the parts in the driving position. Fig. 4 is a perspective view of one of the elements of the mechanism. Fig. 5 is an inner side view of another element of the mechanism.

The embodiment herein shown of our in- Vvention comprises a fixed axle 1 adapted-to be stationarily mounted in the rear fork of a bicycle frame.

2 is the cylindrical shell forming the hub, proper. rPhe shell`2 is herein shown as supported upon bearing balls 3 and 4, the balls 3 being contained in a ball-race' formed in the periphery of a collar 6, said collar being rigidly mounted upon the axle 1. The collar (3 may be held against rotation by any suitable means, such as an armf connected to said collar and adapted to be secured to an adjacent portion of the bicycle frame.

8 is an annular flange formed uponthe periphery of the collar 6 and serving to exclude dust from the bearing.

The bearing balls 4 are contained in a The rotation of ai shell 2 is controlled from the sprocket wheel 11 `through the medium of a sleeve 14. `The diameter ofy Specification of Letters Patent.

said sleeve is such that normally the sleeve Patented aug. aieis. Application filed April 29, 1914. Serial N o. 835,080.

sin

is out of contact with the interior surface 2&5

of the shell 2. One end of said sleeve is provided with an internal screw-thread 15 which engages a similar screw-thread 16 ony the hub 10. The threaded end of the sleeve 14 is provided with an external vannular tapered friction driving surface 17 adapted to coact with a similar surface 1S in the ad- -jacent end of the'shell 2.v The end ofthe sleeve 14'which is provided with the thread 15 and the drivingsurface 17 is nearly sev-- ered from the body of the sleeve by a slot 19.r

The body of the shell is split by a diagonal cut 20. That end of the sleeve 14 which is opposite to the threaded and tapered end is provided with a plurality of V-shape lock# ing teeth 21 adapted to engage a series of similar locking teeth 22 formed upon the inner end portion of the collar 6. The teeth s 21 are formed upon a projecting flange 21a. Said flange is located at one side of the cut 20. It will be noted by inspection of the drawing that the tapered and threaded part of the sleeve is connected to the body of the sleeve at the opposite side of the cut 20 by means of the neck 19a.

The toothed end of the sleeve 14 rests upon a cylindrical extension 23' of the collar 6.'

Anyy suitable means may be provided t0 cause suiiicient resistance to rotation of the sleeve 14, so that rotation ofthe sprocket wheel 11 shall cause endwise movement of the sleeve. Herein, we have shown a split ring 24 whichmay, if desired, be formed integral with the inner end of the extension 28, the free end 24a of said ring having frictional contact with the interior of the sleeve 14.

The interior of the hub may be filled with lubricant. If desired, the periphery of the sleeve 14 may have grooves 25 as indicated, and holes 26 may be formed through the sleeve to permit the lubricant to be cairied around the periphery of the sleeve.

The operation is as follows: When the sprocket Awheel 11 is revolved in the forward direction, the screw-thread 16 causes the sleeve 14 to move toward the right, thereby bringing the surface 17 into driving contact with the surface 18, and thus causing the shell 2 and the sleeve 14 tor revolve with the sprocket wheel 11. 1f the rider 4desires to coast, he holds thesprocket wheel 11 stationary, whereupon the sleeve 14 moves to the left and out of contact with the surface 18. The shell 2 VthenV revolves freely. If the rider desires to brake the wheel, he revolves the sprocket wheel 11 rearwardly, `thereby moving the sleeve 14 toward the left until the teeth 21 thereof are in engagement with the stationary teeth 22. VAs hereinbe-V fore stated, the teethV 21 are at one sideV of the cut 20. Continuing pressure of the screw-thread 16 against the screw thread 15 causes. the portion of the sleeve 14 at the opposite side of the cut 20 to move to the left, lwhich movement, by reason of the diagonal direction ofthe out, causes the sleeve 14 tok expand vinto frictiona-ly contact with the in'- terior surface 2EL yof the shell 2, thereby brakand the sleeve 14 are formed wholly of steel.

The apparatus herein disclosed contains but few parts, and hencefis linexpensive to manufacture.`

3 t will be noted Vthat thercontrolling element 14 is expansible by axial compression, y

and. that when compressed between the collar 6 and the screw-thread 16, said element expands into braking Vcontact with kthe interior surface of the shell 2.

We claim as our invention:

1. A controlling element for a vehicle hub.

consisting of an expansible sleeve having a driving portion at one end,and a locking portion at the other end, said sleeve being Y internally screw-threaded at the driving 4end.

2. A controlling element for a vehicle hub consisting of a sleeve having a driving por-v tionat one end, and a locking portion at the other end, said sleeve being divided by a slot into an end portion and a body portion connected by a neck, the body portion being diagonally split, the neck being at one side of the line of split, and the locking portion being at the other side of said line,

said end portion being internally screw- Y threaded.

3. A driving and braking Amechanism comprising an axle, a hub shell rotatable concentrically with the axle, a stationary locking element, a controlling element in the shell adapted to engage said locking element, said controlling element being expansible into braking Contact with the shell,

'aV driving wheel mounted on the axle, and

an operating connection between the wheel and the controlling element, said connection comprising an integral annular flange on said controlling element.

v4. A driving and; braking mechanism comprising an axle, a hub, shell rotatable concentrically with the axle, a" stationary locking element, a' controlling element withink theY `'shelhsaid controlling element being expansible byl axial compression, one end of said controlling elementbeing adapted to engage the locking element kand the other end of said Ycontrolling element having a dri-ving surface adapted to engage a driving" surface of the kShell,f, anda driving wheel having a hub, said hub being threaded into said controlling element.v

A driving and brakingTv mechanism Comprising on enla-n hub Shell 'rotatable concentricalgly with the axle,y av controlling @lement oxpansible by axial compression into Contact with the interior. surface ofthe sneller-nid Controlling element having a iriv-v ing surface adapted to coact with' ai driving surface 'of the Shel-1 asleeve mounted on said aXl'eand threaded yinto said;` element,

and a driving wheel fixed to said' sleeve. Y y

o. A driving and braking mechanism comprising: axle7` n lnib Shell rotatable oonoontroally with lli-e axle, a stationary 'looking element the shell-,n @ontrolling.V

element within the Shell,v Said; controlling; eloniont being expnnsible by axial: Compression, one end of said controlling element being adapted to. eng-agethe locking element and the Other* end of said controlling Velement having a.drivingI surface adaptedi to. engage a driving surface ofthe shell, a driving wheel navinga hub, Screw-thread Connection; between the nulov and ornel ond of the oontrollngf element, and a stationary snrioertffor the other ond of. theoontrolling element. Y Y

A driving and; braking IneohaniSml Comprising a fixed; axle,4 a collarxeflon the axle, a h ub shell rotatable concentrical'ly with, tno axle, fr Controlling element in the..

snella Said-` eleniont looine onpansibleby axial i compression into braking Contact with the Shell,` one end of; ,Said controlling element being adapted to engage the collar, and the other end of said element being adapted toA frictionalfly engage a driving surface ofthe shell, and a drivingsleevemounted on said axle: and threaded into said controlling element.

8. A driving and braking mechanism comprisingy a. fixed axle, a collar xed on the axle, a hub shell rotatable concentrically with the axle, said collar being grooved to provide a` ball race, boaring balls in lsaid ball racey and supporting- Oneendv of the Shelli, a. bushing-g fixed on the axle.. a driving Wheel. arranged: concentric with the axle, a

ball bearing between the driving wheel and l portion conneoted by a, neck, the body portion being diagonally split, the-,neck being at one side of the line of split, locking teeth on one end of the sleeve at the other side of the line of split7 looking teeth on the collai' adapted to be engaged by the teeth on the sleeve, e frictonal driving surface on said end portion adapted to engage a similar surface Within the shell, a screw-thread connection between Said end portion and the hub of the driving Wheel, said collar having engage the interior off the sleeve.

A. N. WALKEm WM. CUDDY.l

Copies of this patent may be obtained for five cents each, by addressing `the Commissioner otrlatent's. Washington, D. C. 

